Publication details
Time Changes in Resisted Sprinting With a Weighted Vest: 5 % of Body Weight or Back Squat? The Use of The 1RM Back Squat and Body Weight as Load Strategy in Weighted Vest Sprinting
| Authors | |
|---|---|
| Year of publication | 2023 |
| Type | Article in Periodical |
| Magazine / Source | Studia Sportiva |
| MU Faculty or unit | |
| Citation | |
| Web | https://journals.muni.cz/studiasportiva/article/view/33475 |
| Doi | http://dx.doi.org/10.5817/STS2023-1-15 |
| Keywords | sprint training; resistance sprinting; weighted vest |
| Description | The purpose was to investigate whether runners who do not squat their body weight once will not be overloaded with a weight vest with a load of 5% of BW and will not maintain 95% intensity across ten repetitions of a 20-meter sprint. Eight adult female students (24,05±1,15 years old; body height 168±4,24 cm; body weight 60,39±5,53 kg) from the Faculty of Sports Studies at Masaryk University in the Czech Republic participated in this study. The categories were: 1 = NBW (1RM in the squat is relative body weight ± 5 kg), 2 = LBW (1RM in the squat is lower than BW-5 kg) and 3 = HBW (1RM in the squat is higher than BW +5 kg). The measurements were taken on three different days, each day running with another experimental condition: free sprinting, weighted vest sprinting with a 5% load of BW, and weighted vest sprinting with a 5% load of 1RM squat. With a weight vest with resistance at the level of 5% of body weight, during 49 sprints, the intensity decreased to a maximum of 4.82% (participant 4, NBW group, 1st run). Although, with weight vest resistance at the level of 5% of the 1RM back squats, during 68 sprints, the intensity decreased by a maximum of 6.59% (participant 1, NBW group, 8th run). It seems that the level of strength abilities of the lower limbs did not play a role in this, we can calculate 5% intensity from both BW and 1 RM squat. Since the HBW group could maintain the required intensity even at significantly higher weights than 5% BW, further research with a larger research sample is needed. |