The effect of sex and protein supplementation on bone metabolism during a 36-h military field exercise in energy deficit
Thomas J. O’Leary, Charlotte V. Coombs, Victoria C. Edwards, Sam D. Blacker, Rebecca L. Knight, Fiona N. Koivula, Jonathan Tang, William D. Fraser, Sophie L. Wardle, Julie P. Greeves
Abstract
Energy deficits are common in arduous military training and can cause disturbances to bone metabolism. This study provides first evidence that short periods of severe energy deficit and arduous exercise-in the form of a 36-h military field exercise-can suppress bone formation for at least 96 h, and the suppression in bone formation was not different between men and women. Protein feeding does not offset decreases in bone formation during severe energy deficits.
Topics & Concepts
Internal medicineN-terminal telopeptideEndocrinologyBone remodelingMedicineExercise physiologyProcollagen peptidaseTestosterone (patch)Physical exerciseOsteocalcinBiologyAlkaline phosphataseEnzymeBiochemistryMuscle metabolism and nutritionOccupational Health and PerformanceBone health and osteoporosis research