Tags

Type your tag names separated by a space and hit enter

Dietary intake, serum hormones, muscle mass and strength during strength training in 49 - 73-year-old men.
Int J Sports Med. 2007 Dec; 28(12):1070-6.IJ

Abstract

Effects of dietary intake on serum hormones, muscle cross-sectional area (CSA) and strength during strength training were studied in two groups of men: 1) strength training + nutritional counseling (n = 22, 59.1 +/- 6.1 yrs), and 2) strength training (n = 23, 58.5 +/- 7.1 yrs). Both groups performed strength training twice a week for 21 weeks. Counseling increased carbohydrate (p < 0.01) and fiber intake (p < 0.001) and polyunsaturated/saturated fat-ratio (p < 0.05) and decreased fat intake (p < 0.01). Muscle strength and CSA increased by 16 - 20 % and by 5.4 - 5.9 % in both groups (p < 0.001). Changes in protein content of diet correlated with the changes in the acute postexercise concentrations of total (r = 0.64, p < 0.01) and free testosterone (r = 0.54, p < 0.05) after training in the counseling group. Moreover, changes in the free testosterone responses to heavy-resistance exercise correlated with the increases in the muscle CSA (r = 0.52, p < 0.05) in the counseling group. Serum basal testosterone/sex hormone-binding globulin-ratios correlated with the body mass normalized energy (kJ/kg: r = 0.54, p < 0.001), protein (g/kg: r = 0.42, p < 0.01) and fat (g/kg: r = 0.51, p < 0.01) intake in all participants during the training. The data indicate that protein and fat intake may influence serum testosterone concentrations and that the changes in exercise-induced testosterone responses may contribute to muscle mass development during strength training.

Authors+Show Affiliations

Department of Biology of Physical Activity and Neuromuscular Research Center, University of Jyväskylä, Jyväskylä, Finland. janne.sallinen@sport.jyu.fiNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

17497592

Citation

Sallinen, J, et al. "Dietary Intake, Serum Hormones, Muscle Mass and Strength During Strength Training in 49 - 73-year-old Men." International Journal of Sports Medicine, vol. 28, no. 12, 2007, pp. 1070-6.
Sallinen J, Pakarinen A, Fogelholm M, et al. Dietary intake, serum hormones, muscle mass and strength during strength training in 49 - 73-year-old men. Int J Sports Med. 2007;28(12):1070-6.
Sallinen, J., Pakarinen, A., Fogelholm, M., Alen, M., Volek, J. S., Kraemer, W. J., & Häkkinen, K. (2007). Dietary intake, serum hormones, muscle mass and strength during strength training in 49 - 73-year-old men. International Journal of Sports Medicine, 28(12), 1070-6.
Sallinen J, et al. Dietary Intake, Serum Hormones, Muscle Mass and Strength During Strength Training in 49 - 73-year-old Men. Int J Sports Med. 2007;28(12):1070-6. PubMed PMID: 17497592.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Dietary intake, serum hormones, muscle mass and strength during strength training in 49 - 73-year-old men. AU - Sallinen,J, AU - Pakarinen,A, AU - Fogelholm,M, AU - Alen,M, AU - Volek,J S, AU - Kraemer,W J, AU - Häkkinen,K, Y1 - 2007/05/11/ PY - 2007/5/15/pubmed PY - 2008/3/8/medline PY - 2007/5/15/entrez SP - 1070 EP - 6 JF - International journal of sports medicine JO - Int J Sports Med VL - 28 IS - 12 N2 - Effects of dietary intake on serum hormones, muscle cross-sectional area (CSA) and strength during strength training were studied in two groups of men: 1) strength training + nutritional counseling (n = 22, 59.1 +/- 6.1 yrs), and 2) strength training (n = 23, 58.5 +/- 7.1 yrs). Both groups performed strength training twice a week for 21 weeks. Counseling increased carbohydrate (p < 0.01) and fiber intake (p < 0.001) and polyunsaturated/saturated fat-ratio (p < 0.05) and decreased fat intake (p < 0.01). Muscle strength and CSA increased by 16 - 20 % and by 5.4 - 5.9 % in both groups (p < 0.001). Changes in protein content of diet correlated with the changes in the acute postexercise concentrations of total (r = 0.64, p < 0.01) and free testosterone (r = 0.54, p < 0.05) after training in the counseling group. Moreover, changes in the free testosterone responses to heavy-resistance exercise correlated with the increases in the muscle CSA (r = 0.52, p < 0.05) in the counseling group. Serum basal testosterone/sex hormone-binding globulin-ratios correlated with the body mass normalized energy (kJ/kg: r = 0.54, p < 0.001), protein (g/kg: r = 0.42, p < 0.01) and fat (g/kg: r = 0.51, p < 0.01) intake in all participants during the training. The data indicate that protein and fat intake may influence serum testosterone concentrations and that the changes in exercise-induced testosterone responses may contribute to muscle mass development during strength training. SN - 0172-4622 UR - https://www.unboundmedicine.com/medline/citation/17497592/Dietary_intake_serum_hormones_muscle_mass_and_strength_during_strength_training_in_49___73_year_old_men_ L2 - http://www.thieme-connect.com/DOI/DOI?10.1055/s-2007-965003 DB - PRIME DP - Unbound Medicine ER -