Browsing by Supervisor "Agar-Newman, Dana"
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Item The relationship between squat jump force–velocity profiles and 2 km rowing ergometer performance across split intervals(2025) Kussauer, Samson; Klimstra, Marc D.; Agar-Newman, DanaForce–velocity profiling (FVP) provides a practical assessment of neuromuscular capabilities, yet its application to rowing performance remains underexplored. This study investigated the relationship between squat jump–derived FVP metrics and 250 m split performance during a 2 km rowing ergometer test in male varsity rowers. Sixteen athletes (age = 21.12 ± 1.68 y; height = 1.88 ± 0.07 m; body mass = 86.58 ± 9.47 kg) completed a 2 km ergometer trial followed by loaded squat jumps to determine maximal force (F₀), maximal velocity (V₀), maximal power (Pₘₐₓ), and the slope of the force–velocity relationship (SFV). Linear regression analyses revealed that SFV significantly predicted power output across all race segments (r = −0.54 to −0.82), while F₀ significantly predicted all but the first segment (r = 0.51–0.83). Pₘₐₓ and V₀ showed no significant relationships with any segments. Across the race profile, the predictive strength of F₀ increased in later stages, suggesting that force production becomes more critical as fatigue accumulates. These findings highlight the utility of FVP, particularly F₀ and SFV, for monitoring mechanical capabilities relevant to sustained rowing performance and for informing strength-oriented training interventions.Item Using vertical force-velocity profiling to predict swim start performance(2025) Phillips, Kieran; Klimstra, Marc D.; Agar-Newman, DanaThe purpose of this study was to investigate the relationship between vertical force-velocity profiles (FVP) and swimming start performance. Twenty-four varsity-level swimmers (14 females and 10 males) with a mean age of 19.84 ± 1.50 years and body mass of 72.34 ± 7.39 kg were sampled from a varsity swimming program. Participants completed a FVP consisting of loaded squat jumps on force plates across four loads (female: 0.5 kg, 15 kg, 30 kg, 45 kg; male: 0.5 kg, 20 kg, 40 kg, 60 kg) and two maximal swimming starts during the same training week. Swim start performance was quantified using dive distance and time to 10 m. Multiple linear regression identified theoretical maximal force (F0) as a significant predictor of dive distance (β = 0.0212, R2 adjusted = 0.61, p <0.001) with no interaction effect being found for F0 and Sex. In contrast, none of the FVP variables significantly predicted time to 10 m, likely due to a high variability in underwater technique. This study highlights the importance of maximal strength for improving dive distance. However, for an athlete’s strength and power capacities to transfer to overall start performance, athletes must also dedicate time to practicing the start action itself.