Objectives: This investigation examined if the amount of playing time effected countermovement jump performance over the course of a competitive collegiate soccer season. Methods: 22 NCAA Division I female soccer athletes participated in this investigation. Participants were tested at three points throughout the competitive season: pre, mid, and post. At each testing session, participants completed 3 CMJ tri als. All testing was performed using a portable force platform with ground reaction forces sampled at 1000Hz. Participants were put in one of two groups based on playing above or below 50 percent of the available A mixed-methods repeated-measures ANOVA was used to determine if significant differences were present across the season. Results: The percentage of minutes played during the season did not appear to have an impact on CMJ performance as no interactions were found. Propulsive mean force did significantly increase from pre to mid (p = 0.04) and post testing (p = 0.01). Conclusions: CMJ performance did not change in the high or low minute groups over the course of a competitive season. As individuals respond to training loads differently examining individual change rather than group change could provide better insight into the response to the training loads over a season.

Handgrip strength (HGS) assesses a child’s muscular strength and is also a biomarker of future health. To achieve high HGS by adulthood, observing changes in children’s HGS during their development is helpful. However, few studies have yet tracked changes in HGS in young children. Objectives: This study aimed to track the HGS of young children and clarify how children’s HGS changes over time. Design: Follow-up study Methods: Ninety-one young children (48 boys and 43 girls) aged 3.5 to 4.5 years participated in an initial HGS measurement and repeated measurements 1 and 2 years later. Tracking of HGS was assessed using Spearman correlation coefficients (r) and Foulkes and Davies’ tracking index (γ). Results: The Spearman coefficient (r) of HGS for the first year, from 4 to 5 years of age, was low to moderate (range 0.38- 0.59)in boys and girls. However, it was high (range 0.74-0.84) for the second year compared with the first year, from 5 to 6 years of age. The tracking index (γ) ranged from 0.55 to 0.56 for boys and 0.60 to 0.62 for girls (right, left, and average both hands). Conclusion: HGS tracking outcomes for young children were low to moderate based on the two assessments used in this study. Our results indicate that environmental factors, including physical, mental, and cognitive development, may influ ence changes in HGS in children at this age. However, the target levels at each age required to achieve high HGS by adult hood are still being determined, and further follow-up studies are needed.