5 Ways That Workout Nutrition Should be Different For Young People and Children

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Well, this is awkward.

Here we are on Friday – the day that I normally deliver to you some exciting anecdote, video clip, audio interview or other form of multimedia fitness entertainment.

But I'm stuck out in the wilderness at the “Wildflower Triathlon”, with extremely limited bandwidth and an inability to bring you anything that remotely resembles “multimedia”.

So, here in all it's unabashed glory, is an interesting text-based article (my apologies to you audio and video junkies).

I know that many of you have exercising children, or maybe plan on having athletic kids in the future, or heck, perhaps you just have an active nephew or niece.

And when it comes to healthy workout foods for kids and what children should eat during exercise, there's quite a bit of confusion out there. So in this article, I'm going to give you 5 ways that workout nutrition should be different for young people and children.

Ready?

Kids are not just little adults, and growing children who are strenuously exercising have several defining physiological characteristics that make them different than the older population. The following are 5 ways that training and racing nutrition should be different for kids and young active individuals (up to age 16).

1) Athletic girls can succeed on lower carbohydrate intake than athletic boys. In large nutritional surveys that have been done on young athletes ranging from 12-18 years old, the intake of female athletes is on average 3-4 grams per kilogram of body weight lower than male athletes. This seems to make sense, since studies in adult endurance athletes have shown that female endurance athletes tend to be able to oxidize more fat at higher intensities compared to men. An approximate level of carbohydrate intake that would be appropriate for a young athlete would be about 4 grams per kilogram in girls and 7 grams per kilogram in boys (remember there are 2.2 pounds in 1 kilogram). So a 90 pound young female athlete would need to eat around 165 grams of carbohydrate daily, or about 650 calories of carbohydrate.

2) Fat is the preferred exercise fuel in young athletes. In most studies, exercising children have shown 10-40% higher fat oxidation rates compared to exercising adults. Interestingly, very well trained exercising adults (such as Ironman triathletes) show these same high fat oxidation rates. While this shouldn't be used as an excuse to “not eat” during exercise, it would be quite interesting to see studies of children given a higher fat intake prior to exercise compared to children given primarily carbs. I suspect that fueling children with avocados, coconuts, nuts and seeds may yield just as good results as filling them up with candy and energy bars.

3) Compared to exercising adults, exercising children burn lower amounts of storage carbohydrate, but higher amounts of carbohydrate from food sources. Rather than tapping into the body's own carbohydrate stores during exercise, children tend to rely more upon carbohydrate sources from food. This is due to lower levels of the enzymes responsible for breaking down muscle carbohydrate to fuel, and is probably some type of carbohydrate conserving mechanism that leaves more storage carbohydrate for a child's growth and development. While you might think that this should mean you make sure a child has adequate food available during a training session or race, since they're less equipped to break down their own storage energy, this does not appear to be the case, as I point out below.

4) During exercise sessions 75 minutes or less, eating carbohydrates does not appear to give extra performance advantages in young athletes. As you learned earlier, children burn fat more efficiently than adults, and it appears that during exercise, this increased fat oxidation serves as a mechanism to stop any drop in blood glucose. Children's bodies literally have the ability to downregulate the pathways responsible for converting carbohydrates into energy during exercise. Interestingly, free fatty acids, which indicate available fats to burn during exercise, increase in children during exercise, indicating a very strong ability of children to mobilize fat stores for energy and possibly even use energy sources that have higher amounts of fat. Once again, for exercising individuals who are under the age of 16, it may be beneficial to choose fat-based energy sources rather than sugar.

5) Regular adult sports drinks may not empty fast enough from a child's stomach during exercise. In both children and adults, higher exercise intensities slow the rate at which fluids and fuels will pass from the stomach into the intestine, which means that less fuel is absorbed and utilized. However, this occurs to an even greater extent in children who are exercising at higher intensities, and the maximum amount of fluids (either water or a carbohydrate beverage) that a child can absorb per hour in these conditions will be approximately one bike-sized water bottle (about 20-24 ounces).

It would certainly be nice to see more research in the field of sports nutrition for young athletes. Specifically, we should be examining different mixes of carbohydrate and fat than are given to adults, and the rate at which those fuels can empty from the stomach, and be available for absorption and utilization. In the meantime, the young athlete should probably be eating a higher blend of fat before and during exercise, and female young athletes may benefit from lower carbohydrate intake than their male counterparts.

What do you think? What do you feed your kid during exercise? What do you think about healthy workout foods for kids? Share you comments, questions, and feedback below.

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16 thoughts on “5 Ways That Workout Nutrition Should be Different For Young People and Children

  1. Talia says:

    Would be really good to hear more about sports nutrition for kids. My 11 year old is a gymnast currently training 20 hours per week. I would like to feed him a nutritionally sound diet to support this level of training. Finding good information is hard. Your blog posts are easily my favourite when it comes to all things sport recovery, training and nutrition.

  2. Eddie Potter says:

    Is this still relevant information? And would the same apply for say a soccer player vs an endurance athlete?

    Regards,

    Eddie

    1. Yes, it's still totally relevant although for a soccer player you'll want a slightly higher amount of carbohydrate, especially in the evenings prior to competition to ensure that glycogen levels are full.

  3. Andy says:

    I've found this article is totally handy for everyone and whatever discussion you have made here about the difference of children and young people nutrition workout totally effective and should know to everyone. Thanks dude.
    adventure racing

  4. Peter Spangenberg says:

    Hi, just a quick comment: there are 2.2 lbs in 1 Kilogram, and not the other way round as you ppoint out in you your first paragraph.
    Sincerely,
    Dr. Peter Spangenberg
    Pediatrician

    1. Thanks Peter! I would be screwed without good proofreaders and smart guys like you!

  5. LJ says:

    I am interested in the article/book you gathered this information from….good to know the sources that are currently doing research in young children.

    1. Here are some good references for you:
      A.D.A. (1996a) Timely statement of The American Dietetic Association: nutrition guidance for adolescent athletes in organized
      sports. Journal of the American Dietetic Association 96, 611-
      612. A.D.A. (1996b) Timely statement of The American Dietetic Association: nutrition guidance for child athletes in organized sports.
      Journal of the American Dietetic Association 96, 610-611.
      Achten, J., Gleeson, M. and Jeukendrup, A. (2002) Determination of the
      exercise intensity that elicits maximal fat oxidation. Medicine
      and Science in Sports and Exercise 34, 92-97.
      Amiel, S.A., Caprio, S., Sherwin, R.S., Plewe, G., Haymond, M.W. and
      Tamborlane, W.V. (1991) Insulin resistance of puberty: a defect
      restricted to peripheral glucose metabolism. Journal of Clinical
      Endocrinology and Metabolism 72, 277-282.
      Amiel, S.A., Sherwin, R.S., Simonson, D.C., Lauritano, A.A. and Tamborlane, W.V. (1986) Impaired insulin action in puberty. A contributing factor to poor glycemic control in adolescents with
      diabetes. New England Journal of Medicine 315, 215-219.
      Armstrong, N. and Welsman, J.R. (1994) Assessment and interpretation
      of aerobic fitness in children and adolescents. Exercise and
      Sport Sciences Reviews 22, 435-476.
      Banerjee, S., Saenger, P., Hu, M., Chen, W. and Barzilai, N, (1997) Fat
      accretion and the regulation of insulin-mediated glycogen synthesis after puberty in rats. American Journal of Physiology 273,
      R1534-R1539.
      Bass, S, and Inge, K. (2000) Nutrition for special populations: children
      and young athletes. In: Clinical sports nutrition. Eds: Burke,
      L.M. and Deakin, V. 2nd edition. McGraw Hill, Australia. 554-
      601.
      Berg, A. and Keul, J. (1988) Biochemical changes during exercise in
      children. In: Young athletes. Biological, psychological, and
      educational perspectives. Ed: Malina, R.M. Human Kinetics, Illinois. 61-77.
      Bergman, B.C. and Brooks, G.A. (1999) Respiratory gas-exchange
      ratios during graded exercise in fed and fasted trained and untrained men. Journal of Applied Physiology 86, 479-487.
      Bloch, C.A., Clemons, P. and Sperling, M.A. (1987) Puberty decreases
      insulin sensitivity. Journal of Pediatrics 110, 481-487.
      Boisseau, N. and Delamarch, A. (2000) Metabolic and hormonal
      resonses to exercise in children and adolescents. Sports Medicine 30, 405-422.
      Burelle, Y., Peronnet, F., Charpentier, S., Lavoie, C., Hillarie-Marcel, C.
      and Massicotte, D, (1999) Oxidation of an oral [13C]glucose
      load at rest and prolonged exercise in trained ans sedentary subjects. Journal of Applied Physiology 86, 52-60.
      Burke, L.M. (2000) Nutrition for recovery after competition and training. In: Clinical Sports Nutrition. Eds: Burke, L.M. and Deakin,
      V. 2nd edition. McGraw Hill, Australia. 396-427.
      Burke, L.M., Cox, G.R., Cummings, N.K. and Desbrow, B. (2001)
      Guidelines for daily carbohydrate intake. Do athletes achieve
      them? Sports Medicine 31, 267-299.
      Burke, L.M., Kiens, B. and Ivy, J.L. (2004) Carbohydrate and fat for
      training and recovery. In: Food, nutrition and sports performance. Eds: Maughan, R.J., Burke, L.M. and Coyle, E.F. The International Olympic Committee. Consensus on Sports Nutrition.
      Routledge, London. 24-49.
      Chen, J.D., Wang, J.F., Zhao, Y.W., Jiao,Y. and Hou, X.Y. (1989)
      Nutritional problems and measures in elite and amateur athletes.
      American Journal of Clinical Nutrition 49, 1084-1089.
      Coyle, E. (2004) Fluid and fuel intake during exercise. Journal of Sports
      Sciences 22, 39-55.
      Cupisti, A., D'Alessandro, C., Castrogiovanni, S., Barale, A. and Morelli, E. (2002) Nutrition knowledge and dietary composition in
      Italian adolescent female athletes and non-athletes. International Journal of Sports Nutrition and Exercise Metabolism 12,
      207-219.
      Delamarch, P., Delamarch, A., Monnier, M. and Favier, R. (1992a)
      Catecholamines and glucose utilization during prolonged exercise in children. Children and Exercise Pediatric Work Physiology. Paris, Masson. 27-29.
      Delamarch, P., Monnier, M., Delamarch, G.A., Koubi, H.E., Mayet,
      M.H. and Favier, R. (1992b) Glucose and free fatty acid metabolism during prolonged exercise in prepubertal boys in relation to catecholamine responses. European Journal of Applied
      Physiology 65, 66-72.
      Duncan, G,E. and Howley, E.T. (1998) Metabolic and perceptual responses to short-term cycle training in children. Pediatric Exercise Science 10, 110-122.

      1. Duncan, G.E. and Howley, E.T. (1999) Substrate metabolism duirng
        exercise in children and the crossover concept. Pediatric Exercise Science 11, 12-21.
        Eriksson, B.O. (1980) Muscle metabolism in children – A review. Acta
        Paediatrica Scandinavica 283, 20-28.
        Eriksson, B.O., Karlsson, J. and Saltin, B. (1971) Muscle metabolism
        during exercise in pubertal boys. Acta Paediatrica Scandinavica
        217, 154-157.
        Falk, B. (1998) Effects of thermal stress during rest and exercise in the
        paediatric population. Sports Medicine 25, 221-240.
        Fogelholm, M., Rankinen, T., Isokaanta, M., Kujala, U. and Uusitupa,
        M, (2000) Growth, dietary intake, and trace element status in
        pubescent athletes and schoolchildren. Medicine and Science in
        Sports and Exercise 32, 738-746.
        Foricher, J., Boisseau, N., Ville, N.S., Berthon, P.M., Bentue-Ferrer, D.,
        Gratas-Delamarche, A. and Delamarch, P. (2003a) Effets of an
        oral glucose challenge on metabolic and hormonal responses to
        exercise in active prepubertal girls. Pediatric Exercise Science
        15, 266-276.
        Foricher, J.M., Ville, N.S., Delamarch, A. and Delamarch, P (2003b)
        Effects of submaximal intensity cycle ergometry for one hour
        on substrate utilisation in trained prepubertal boys versus
        trained adults. Journal of Sports Medicine and Physical Fitness
        43, 36-43.
        Gomes, H. (2004) Gastric emptying in children. Journal of Pediatric
        Gastroenterology and Nutrition 39, 236-238.
        Gomes, H., Hornoy, P. and Liehn, J.C. (2003) Ultrasonography and
        gastric emptying in children: validation of sonographic method
        and determination of physiological and pathological patterns.
        Pediatric Radiology 33, 522-529.
        Hendelman, D.L., Ornstein, K., Debold, E.P., Volpe, S.L. and Freedson,
        P.S. (1997) Preexercise feeding in untrained adolescent boys
        does not affect responses to endurance exercise or performance.
        International Journal of Sports Nutrition 7, 207-218.
        Heptulla, R.A., Stewart, A., Enocksson, S., Rife, F., Yong-Zhan, T.,
        Sherwin, R.S., Tamborlane, W.V. and Caprio, S, (2003) In situ
        evidence that peropheral insulin presistance in adolescents with
        poorly controlled Type 1 diabetes is associated with impaired
        suppression of lipolysis: a microdialysis study. Pediatric Research 53, 830-835.
        Houmard, J.A., Egan, P.C., Johns, R.A., Neufer, P.D., Chenier, T.C. and
        Israel, R.G. (1991) Gastric emptying during 1 h of cycling and
        running at 75 % VO2max. Medicine and Science in Sports and
        Exercise 23, 320-325.
        Iuliano, S., Naughton, G., Collier, G. and Carlson, J. (1998) Examination of the self selected fluid intake practises by junior athletes
        duringa simulated duathlon event. International Journal of
        Sport Nutrition 8, 10-23.
        Jeukendrup, A. (2004) Carbohydrate intake during exercise and performance. Nutrition 20, 669-677.Jeukendrup, A., Saris, W., Brouns, F. and Kester, A. (1996) A new
        validated endurance performance test. Medicine and Science in
        Sports and Exercise 28, 266-270.
        Lambert, G.P., Chang, R.T., Joensen, D., Shi, X., Summers, R.W.,
        Schedl, H.P. and Gisolfi, C.V. (1996) Simultaneous determination of gastric emptying and intestinal absorption during exercise in humans. International Journal of Sports Medicine 17,
        48-55.
        Leblanc, J.C., Le Gall, F., Grandjean, V. and Verger, P. (2002) Nutritional intake of French soccer players at the Clairefontaine training center. International Journal of Sports Nutrition and Exercise Metabolism 12, 268-280.
        Leiper, J.B. (2001) Gastric emptying and intestinal absorption of fluids,
        carbohydrates, and electrolytes. In: Sports drinks. Eds:

        1. Maughan, R.J. and Murray, R. CRC Press, USA. 89-128.
          Leiper, J.B., Nicholas, C.W., Ali, A., Williams, C. and Maughan, R.J.
          (2005) The effect of intermittent high-intensity running on gastric emptying of fluids in man. Medicine and Science in Sports
          and Exercise 37, 240-247.
          Malina, R.M., Bouchard, C. and Bar-Or, O. (2004) Thermoregulation
          during growth. Growth, maturation, and physical activity. 2 nd
          edition. Human Kinetics, USA. 267-273.
          Martinez, L.R. and Haymes, E.M. (1992) Substrate utilization during
          treadmill running in prepubertal girls and women. Medicine and
          Science in Sports and Exercise 24, 975-983.
          Maughan, R.J. and Burke, L.M. (2000) Sports nutrition: an historical
          perspective. In: Clinical sports nutrition. Eds: Burke, L.M. and
          Deakin, V. 2nd edition. McGraw Hill. 1-13. McConell, G., Fabris, S., Proietto, J. and Hargreaves, M. (1994) Effect
          of carbohydrate ingestion on glucose kinetics during exercise.
          Journal of Applied Physiology 77, 1537-1541.
          Mitchell, J.B., Costill, D.L., Houmard, J.A., Flynn, M.G., Fink, W.J. and
          Beltz, J.D. (1988) Effects of carbohydrate ingestion on gastric
          emptying and exercise performance. Medicine and Science in
          Sports and Exercise 20, 110-115.
          Mitchell, J.B. and Voss, K.W. (1991) The influence of volume on
          gastric emptying and fluid balance during prolonged exercise.
          Medicine and Science in Sports and Exercise 23, 314-319.
          Montfort-Steiger, V. (2005) Carbohydrate intake in adolescent cyclists:
          habitual intake, endurance performance and gastric emptying.
          Unpublished PhD thesis, University of Exeter.
          Montfort-Steiger, V., Williams, C.A. and Armstrong, N. (2005) The
          reproducibility of an endurance performance test in adolescent
          cyclists. European Journal of Applied Physiology 94, 618-625.
          Moran, A.D.A., Jacobs, D.R., Steinberger, J., Hong, C.P., Prineas, R.,
          Luepker, R. and Sinaiko, A.R. (1999) Insulin resistance during
          puberty. Results from clamp studies in 357 children. Diabetes
          48, 2039-2044.
          Murray, R. (1987) The effects of consuming carbohydrate-electrolyte
          beverages on gastric emptying and fluid absorption during and
          following exercise. Sports Medicine 4, 322-351.
          Noakes, T.D., Rehrer, N.J. and Maughan, R.J. (1991) The importance of
          volume in regulating gastric emptying. Medicine and Science in
          Sports and Exercise 23, 307-313.
          Papadopoulou, S.K., Papadopoulou, S.D. and Gallos, G. (2002) Macro-
          and micro-nutrient intake of adolescent Greek female volleyball
          players. International Journal of Sports Nutrition and Exercise
          Metabolism 12, 73-80.

          1. Petrie, H.J., Stover, E.S. and Horswill, C.A. (2004) Nutritional concerns
            for the child and adolescent competitor. Journal of Nutrition 20,
            620-631.
            Riddell, M.C., Bar-Or, O., Hollidge-Horvat, M., Schwarcz, H.P. and
            Heigenhauser, G.J.F. (2000a) Glucose ingestion and substrate
            utilization during exercise in boys with IDDM. Journal of Applied Physiology 88, 1239-1246.
            Riddell, M.C., Bar-Or, O., Schwarcz, H.P. and Heigenhauser, G.J.F.
            (2000b) Substrate utilization in boys during exercise with
            [13C]-glucose ingestion. European Journal of Applied Physiology 83, 441-448
            Riddell, M.C., Bar-Or, O., Wilk, B., Parolin M.L. and Heigenhauser,
            G.J.F. (2001) Substrate utilization during exercise with glucose
            and glucose plus fructose ingestion in boys ages 10-14 yr. Journal of Applied Physiology 90, 903-911. Riddell, M.C., Partington, S.L., Stupka, N., Armstrong, D., Rennie, C.
            and Tarnopolski, M.A. (2003) Substrate utilization during exercise performed with and without glucose ingestion in female
            and male endurance-trained athletes. International Journal of
            Sport Nutrition 13, 407-421.
            Rowland, T. and Rimany, T.A. (1995) Physiological responses to prolonged exercise in premenarchal and adult females. Pediatric
            Exercise Science 7, 183-191.
            Sherman, W.M. and Lamb, D.R. (1988) Nutrition and prolonged exercise. In: Perspectives in exercise science and sports medicine:
            prolonged exercise, vol 1. Eds: Lamb, D.R. and Murray, R.
            Benchmark Press, Indianapolis. 213-280.
            Smith, C.P., Archibald, H.R., Thomas, J.M., Tarn, A.C., Williams,
            A.J.K., Gale, E.A.M. and Savage, M.O. (1988) Basal and stimulated insulin levels rise with advancing puberty. Clinical Endocrinology 28, 7-14.
            Sunehag, A.L., Toffolo, G., Treuth, M.S., Butte, N.F., Cobelli, C., Bier,
            D.M. and Haymond, M.W. (2002) Effects of dietary macronutrient content on glucose metabolism in children. Journal of
            Clinical Endocrinology and Metabolism 87, 5168-5178.
            Tarnopolski, M.A. (2000) Gender differences in metabolism; nutrition
            and supplements. Journal of Science and Medicine in Sport 3,
            287-298.
            Timmons, B.W., Bar-Or, O. and Riddell, M.C. (2003) Oxidation rate of
            exogenous carbohydrate during exercise is higher in boys than
            in men. Journal of Applied Physiology 94, 278-284.
            Wiita, B.G. and Stombaugh, I.A. (1996) Nutrition knowledge, eating
            practices, and health of adolescent female runners: a 3-year longitudinal study. International Journal of Sport Nutrition 6, 414-
            425.Wilk, B., Kriemler, S., Keller, H. and Bar-Or, O. (1998) Consistency in
            preventing voluntary dehydration in boys who drink a flovored
            carbohydrate-NaCl beverage during exercise in the heat. International Journal of Sport Nutrition 8, 1-9.
            Wojtaszewski, J.F.P. and Richter, E.A. (1998) Glucose utilization during
            exercise: influence of endurance training. Acta Physiologica
            Scandinavica 162, 351-358.
            Zehnder, M., Rico-Sanz, J. and Kuhne, G. (2001) Resynthesis of muscle
            glycogen after soccer specific performance examined by
            13
            Cmagnetic resonance spectroscopy in elite players. European
            Journal of Applied Physiology 84, 443-447

      2. mark jones says:

        interesting article, Ben. Ive been wondering about this subject for a while as my 11yr old daughter is now training properly 3-4 x week as a swimmer.
        Rightly or wrongly what i take from your views is that we shouldn't be loading up children with supplements or a lot of additional food, except perhaps some fats (light) prior to exercise. I wonder though where this leaves the questions of recovery food (banana being the current article for her) and hydration. All the best. Mark

        1. One thing to bear in mind is that if kids burn fewer fed carbohydrates and storage glycogen during exercise, it's unlikely that post-workout recovery via carbohydrate replenishment is as important for kids. But we do know that due to smaller surface area per body mass, the hydration needs of children are more important than adults, before, during and after exercise.

  6. Armi Legge says:

    Hi Ben,
    Great article on nutrition for kids. Something else I think would be really great to mention is how nutritional deficiencies can ad up really quickly in young athletes too. Many people seem to think that just because we're young and eating a ton of food means we're getting everything we need.
    Thanks so much for the great work and good luck @ Wildflower!

    -Armi

  7. Deeonna says:

    Actually I find this information interesting because it may shed light on how to build a fitness plan for a child that is overweight or suffering from type 2 diabetes or hypertension. I imagine that the biochemisty in these children would be different but it's a better starting place that mimicing exercise and nutrition plans designed for adults.

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