A randomized trial of protein supplementation compared with extra fast food on the effects of resistance training to increase metabolism
2012 (English)In: Scandinavian Journal of Clinical and Laboratory Investigation, ISSN 0036-5513, Vol. 72, no 6, 471-478 p.Article in journal (Refereed) Published
Objective. To prospectively evaluate the effects of resistance training combined with increased energy intake or protein-supplementation on lean body-mass, resting metabolic-rate (RMR) and cardiovascular risk factors. Methods. Twenty-four healthy males (aged 19-32 years) performed resistance exercise for 12 weeks aiming for at least 1 hour training-sessions 3 times a week. The participants were randomized to consume extra protein (33 g whey protein/day) or a meal of fast-food/day (1350 kcal, 41 g protein). Body-composition was measured with Dual-Energy X-ray Absorptiometry (DEXA) and RMR by indirect calorimetry. Fasting blood samples were drawn before and after the 3-month training period and after 12 months. Results. The body weight increased from 75.1 +/- 6.9 kg to 78.7 +/- 7.2 kg (p andlt; 0.0001), without differences between the groups. RMR increased from 1787 +/- 143 kcal/24 h to 1954 +/- 187 kcal/24 h (p andlt; 0.0001, N = 24), which was more than expected from the increase in lean body-mass (increase from 59.7 +/- 4.3 kg to 61.8 +/- 4.1 kg p = 0.004). Fasting serum-insulin levels increased in the fast-food group compared with the extra-protein group (p = 0.03). ApoB increased from 0.691 +/- 0.14 g/L to 0.768 +/- 0.17 g/L, p = 0.004, in the fast-food group only. Long-term follow up after 12 months showed that RMR, body weight, total fat and lean body-masses did not differ from baseline (n = 19). Conclusions. Resistance training for 12 weeks increased RMR and lean body-mass similarly when based on either an increased energy-intake or protein supplement. However, the increase in RMR was higher than expected from the increase in lean body-mass. Thus resistance training could potentially decrease the risk of obesity by induction of increased RMR.
Place, publisher, year, edition, pages
Informa Healthcare , 2012. Vol. 72, no 6, 471-478 p.
Cholesterol, insulin, resistance training, protein, fast-food
Medical and Health Sciences
IdentifiersURN: urn:nbn:se:liu:diva-84890DOI: 10.3109/00365513.2012.698021ISI: 000308941400006OAI: oai:DiVA.org:liu-84890DiVA: diva2:563998
Funding Agencies|University Hospital of Linkoping Research Funds||Linkoping University||Gamla Tjanarinnor||Medical Research Council of Southeast Sweden||Diabetes Research Centre of Linkoping University||2012-11-012012-10-262014-01-16Bibliographically approved