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High-impact jumping mitigates the short-term effects of low energy availability on bone resorption but not formation in regularly menstruating females: A randomized control trial
Date
2023
Abstract
Low energy availability (LEA) is prevalent in active individuals and negatively impacts bone turnover in young females. High-impact exercise can promote bone health in an energy efficient manner and may benefit bone during periods of LEA. Nineteen regularly menstruating females (aged 18–31 years) participated in two three-day conditions providing 15 (LEA) and 45kcalskg fat-free mass−1day−1 (BAL) of energy availability, each beginning 3±1days following the self-reported onset of menses. Participants either did (LEA+J, n=10) or did not (LEA, n=9) perform 20 high-impact jumps twice per day during LEA, with P1NP, β-CTx (circulating biomarkers of bone formation and resorption, respectively) and other markers of LEA measured pre and post in a resting and fasted state. Data are presented as estimated marginal mean±95% CI. P1NP was significantly reduced in LEA (71.8±6.1–60.4±6.2ngmL−1, p 0.999, d=0.19), and these effects were significantly different (time by condition interaction: p=0.007). Morning basal bone formation rate is reduced following 3days LEA, induced via dietary restriction, with or without high-impact jumping in regularly menstruating young females. However, high-impact jumping can prevent an increase in morning basal bone resorption rate and may benefit long-term bone health in individuals repeatedly exposed to such bouts.
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Description
Publisher
Wiley and Sons Ltd.,
Citation
Scandinavian Journal of Medicine & Science In Sports, 2023, 33, pp. 1690-1702
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Funding Information
American College of Sports Medicine;Loughborough University