1. Effects of different lifting strategies during resistance training on lower body function in untrained adult women : a comparison between 6-weeks of 10% velocity loss and standard resistance trainingMatic Sašek, Hana Golob, Nejc Šarabon, 2026, izvirni znanstveni članek Opis: Introduction: This study investigated whether velocity-based resistance training provides additional benefits to lower limb performance compared to standard exercise execution. Methods: Twenty untrained adult women (37–55 years) were randomly assigned to two resistance training groups to perform resistance training with three sets of four lower body exercises per week for 6 weeks. The number of repetitions and lifting velocity differed between the groups. One group performed lower body exercises with maximal intent and a 10% velocity loss threshold termination (VB10%; n = 10), while the other group performed 10 repetitions at a standard 1:2 s concentric:eccentric tempo (STD; n = 10). The number of repetitions was recorded during the sessions. Before and after the intervention, power, muscular endurance and dynamic stability of the lower limbs were assessed using the mean propulsive velocity (MPV) and power (MPP) at 70% one-repetition maximum in the squat and deadlift, the Y-balance test (YBT) and the 30-second sit-to-stand test (STS), respectively. A two-way analysis of variance was used to assess the effects of time, group, and their interaction. Results: The difference between 10 repetitions in the STD and repetitions in the VB10% was assessed using a one-sample t-test. Both groups significantly improved MPP, MPV, YBT and STS [mean difference (MD) ≥5.4%; effect size (ES) ≥0.6]. Although 2.5–2.7 less repetitions were performed in VB10%, the improvements in MPP and MPV were slightly greater (ES ≥ 1.2 vs. ≥ 0.8). Conversely, STS and YBT improved more in STD (ES ≥ 0.4 vs. ≥ 1.0). Discussion: Regardless of the lifting method used, the training intervention improved lower limb power, muscular endurance and dynamic stability, indicating that resistance training is an effective strategy for enhancing these capacities in untrained adult women. Using 10% threshold may be a more time-efficient strategy for improving lower-limb power in this population and could represent a promising approach for mitigating early declines in power over time.
Ključne besede: adult women, dynapenia, muscle performance, power, powerpenia, resistance training, strength, velocity loss
Objavljeno v RUP: 14.01.2026; Ogledov: 101; Prenosov: 1
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2. Within-session reliability and comparison in resisted sprint performance with the 1080 Sprint between belt and harness attachment pointsMatic Sašek, Nicola Reiner Volk, Nejc Šarabon, 2025, izvirni znanstveni članek Opis: The application of resistance over the shoulder or hips during resisted sprints could influence performance outcomes but has not been thoroughly investigated. This study examined the within-session reliability of sprint performance measures and compared the outcomes of 1080 Sprint device between belt (hips) and harness (shoulders) attachment. Twelve student-athletes completed three 20 m sprints with resistance equivalent to 25% of body mass (14.0 to 24.7 kg). Sprint split times (5 m, 10 m, 15 m, 20 m), peak velocity, and distance at peak velocity were recorded with 1080 Sprint. Within-session reliability was assessed using intraclass correlation coefficients (ICC3.1) and coefficients of variation (CV), while differences in performance were analysed using paired t-tests and effect sizes (ES). Reliability was excellent for all variables (ICC3.1≥ 0.93; CV ≤ 3.08 %) except distance at peak velocity, which showed poor reliability (ICC3.1≥ 0.32; CV ≥ 17.2 %). Sprint times and peak velocity were faster with the belt attachment (ES ≥ 0.93), while peak velocity was reached earlier with the harness attachment (ES = 0.65). Both attachment points provided reliable measurements, but the belt consistently resulted in faster 20 m sprint performance. Coaches and practitioners should consider these differences when assessing resisted sprint performance or prescribing training to ensure consistent and individualized loading strategies
Ključne besede: resisted sprint, resistance, sprint performance, speed assessment
Objavljeno v RUP: 30.12.2025; Ogledov: 213; Prenosov: 0
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5. Curvilinear sprint acceleration-speed profile in youth soccer players is constrained by tighter radii and sprinting side dominance : aAžbe Ribič, Darjan Smajla, Oskar Cvjetičanin, Matic Sašek, 2025, izvirni znanstveni članek Opis: This study investigated how the acceleration-speed profile (ASP) of the weaker and stronger side changes at different radii. Twenty male youth soccer players completed 30 m linear and curvilinear sprints (12.15, 11.15, 9.15, 7.15, and 6.15 m radius) in three training sessions. Sprint speed and acceleration over time and distance were recorded using a GNSS device. The maximum theoretical speed (S0), the acceleration (A0), slope of the ASP (ASslope), the area under the ASslope (ASParea), the acceleration at a sprint speed of 3 m/s (A3), and the curvilinear sprint deficit (ASPdeficit) of the individual sprints were analyzed. The effects of side, radius, and their interaction were evaluated with 2 × 5 ANOVA and the post hoc tests. A significant effect of radius and side was observed for all variables (F ≥ 3.50, p ≤ 0.037, η2 ≥ 0.15). The ASParea and S0 decreased at tighter radii. The A3 and A0 remained relatively unchanged, resulting in a steeper ASslope, and a larger ASPdeficit. At the same radius, the weaker side CS had a smaller ASParea, S0, A3, and a larger ASPdeficit. The ASP of the curvilinear sprint in youth soccer players is side-dependent at both ends (acceleration and top speed), while radii mainly affect late acceleration and top speed performance. These observations should be considered when adapting soccer players’ sprint training and monitoring external load based on acceleration.
Ključne besede: curvilinear sprint, acceleration-speed profile, sprint performance, soccer
Objavljeno v RUP: 08.09.2025; Ogledov: 479; Prenosov: 7
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