|
| << previous | next >> |
Journal description
All volumes of the corresponding journal
All issues of the corresponding volume
All articles of the corresponding issues
Details for article 8 of 12 found articles
| Title: |
Moderate intensity and volume downhill run does not impair knee joint stability at early and late phases of quadriceps/hamstrings contraction |
| Author: |
de Oliveira Assumpção, Cláudio de Lima, Leonardo Coelho Rabello de Oliveira, Felipe Bruno Dias Greco, Camila Coelho Denadai, Benedito Sérgio |
| Appeared in: |
Isokinetics and exercise science |
| Paging: | Volume 22 (2014) nr. 4 pages 311-317 |
| Year: |
2014-11-05 |
| Contents: |
BACKGROUND AND OBJECTIVE: Muscle strength imbalance can be an important factor in hamstrings muscle strain. The main purpose of this study was to investigate the effects of downhill running on hamstrings/quadriceps torque (H/Q_{torque}) and the electromechanical delay (H/Q_{EMD}) ratios. METHODS: Fifteen active male individuals performed two maximal voluntary isometric contractions of the knee extensors and knee flexors, from which the maximal muscle torque, EMD and H/Q_{torque} and H/Q_{EMD} ratios were extracted. Thereafter, the participants performed a 30-minute downhill run (−16%) at 70% VO_{2}max. Dependent variables were assessed immediately before, immediately following and 48 hours after the effort. RESULTS: Maximal isometric torque decreased significantly immediately after the downhill run for both the extensors (pre: 271.8 ± 45.9 N˙m; post: 235.5 ± 55.7 N˙m) and flexors (pre: 112.2 ± 26.3 N˙m; post: 97.7 ± 27.2 N˙m). No significant difference was identified over time for the EMD of the vastus lateralis and biceps femoris muscles. The H/Q_{torque} and H/Q_{EMD} ratios were not influenced by the downhill run. CONCLUSION: We have demonstrated that moderate intensity and volume downhill run does not impair knee joint stability at early (H/Q_{EMD}) and late phases (H/Q_{torque}) of quadriceps/hamstrings contraction. |
| Publisher: |
IOS Press |
| Source file: |
Elektronische Wetenschappelijke Tijdschriften |
Details for article 8 of 12 found articles
| << previous | next >> |