RT Journal Article
T1 Load-Time and Load-Speed Relationship in the Resisted Sled Sprint Exercise: What Independent Variable Most Accurately Determines the Relative Load?
A1 Jiménez-Lozano, Manuel
A1 Yáñez-García, Juan Manuel
A1 Mora-Custodio, Ricardo
A1 Valle-Salguero, Adrián
A1 Díez-Fernández, David M.
A1 Franco-Márquez, Felipe
A1 González Badillo, Juan José
A1 Rodríguez Rosell, David
K1 Sled-towing training
K1 Training prescription
K1 Athletic performance
K1 Instantaneous speed
K1 Load-speed profile
AB The aims of this study were to analyze the load-speed and load-time relationships in the resisted sled sprint exercise using different variables as relative load and to estimate the decrement of speed sprint and the increase of sprint time across different loads. Thirty young healthy men performed a progressive loading test in the countermovement jump (CMJ) exercise to determinate the load that elicited a 2 m·s−1 peak velocity (PV2-load) and in the full squat exercise to obtain the 1 repetition maximum (1RM) value and the load that elicited a 1 m·s−1 mean velocity (V1-load). In addition, subjects performed a progressive loading test in the resisted sled sprint exercise, whereas time and instantaneous speed at 10 (T10 and V10) and 20 m (T20 and V20) were measured. The independent variables used were body mass (BM), 1RM and V1-load in the squat exercise, the PV2-Load in the loaded CMJ exercise, 1RM + BM, V1-Load + BM, and PV2-Load + BM. To analyze whether relationships were dependent on individual performance obtained in unloaded sprint, the total sample was divided into 3 subgroups: high performance (T20 < 3.00 s), medium performance (T20:3.00–3.12 s), and low performance (T20 > 3.12 seconds) groups. The independent variables showing the highest relationships with time and speed in 10 and 20 m were %BM, %BM + V1-load, and %BM + PV2-load. Statistically significant differences between performance groups in %DSS (decrease of sprint speed) and %IST (increase sprint time) in 20 m were found when %BM was used as relative load, whereas there were no significant differences between groups for %BM + PV2-load or %BM + V1-load. In conclusion, the use of %BM + PV2-load and %BM + V1-load should be considered as variables for monitoring the relative load in the resisted sled sprint exercise.
PB National Strength and Conditioning Association
YR 2023
FD 2023
LK https://hdl.handle.net/10433/25077
UL https://hdl.handle.net/10433/25077
LA en
NO Journal of Strength and Conditioning Research 37(11):p 2167-2177
NO Departamento: Deporte e Informática
DS RIO
RD Apr 24, 2026