Muscle Strength
Conditions
Keywords
Isokinetic training, peak torque, acceleration time, deceleration time, time to peak torque, Hamstring-to-Quadriceps ratio
Brief summary
Mode specificity of eccentric and concentric isokinetic training have been examined in previous studies but with conflicting results. The present study aimed to examine the mode-specific effects of eccentric and concentric isokinetic training of hamstring muscle at slow angular velocity on eccentric peak torque of hamstring (PTecc), concentric peak torque of quadriceps (PTcon), acceleration time of hamstring (AThams) and quadriceps (ATquad), deceleration time of hamstring (DThams) and quadriceps (DTquad), time to peak torque of hamstring (TPThams) and quadriceps (TPTquad), and functional Hamstring-to-Quadriceps ratio (PTecc/PTcon).
Detailed description
Several studies in past have tried to examine the mode specificity of concentric and eccentric training of different muscles and at different angular velocities i.e. whether concentric training will increase the concentric strength only or both concentric and eccentric strength and whether eccentric training will increase eccentric strength only or both eccentric and concentric strength. Since conflicting reports are available regarding mode specificity of eccentric and concentric isokinetic training therefore one study was needed that can examine the mode specificity of these training in hamstring muscles at slow angular velocity. The present study aimed to examine the mode-specific effects of six weeks of isokinetic concentric and eccentric training of the hamstring muscle at slow angular velocity on the PTecc/PTcon, AT, DT, and TPT.
Interventions
OTHEREccentric isokinetic training
Eccentric exercises of the hamstring muscles were performed with the use of an isokinetic dynamometer device.
OTHERConcentric isokinetic training
Concentric exercises of the hamstring muscles were performed with the use of an isokinetic dynamometer device.
Sponsors
King Saud University
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
BASIC_SCIENCE
Masking
DOUBLE (Subject, Outcomes Assessor)
Intervention model description
Participants were randomly divided into two groups.
Eligibility
Sex/Gender
MALE
Age
18 Years to 28 Years
Healthy volunteers
Yes
Inclusion criteria
* Healthy young males * Age between 18 to 27 * Recreationally active who used to engage regularly in 1-5 hours of physical activity per week
Exclusion criteria
* Individual presently indulged in strength training of knee. * Individuals with any kind of injury around the knee, hip, ankle, foot * Unconsolidated fractures around the knee. • Stress fractures * Subjects with the acute phase of trauma, which may interfere with the exercise regime * Subjects with cardio-respiratory problems and other medical problems like diabetes, asthma, etc. * Subjects with tendinitis and other inflammatory conditions.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Functional Hamstring-to-quadriceps ratio (PTecc:PTcon) | 6 weeks | This ratio was calculated using eccentric peak of hamstring and concentric peak torque of quadriceps muscle |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Acceleration time of quadriceps | 6 weeks | Time required by quadriceps muscle to reach desired velocity was noted. |
| Deceleration time of hamstring (DThams) | 6 weeks | Time required by hamstring muscle to reach zero velocity from target velocity, was noted. |
| Acceleration time of hamstring (AThams) | 6 weeks | Time required by hamstring muscle to reach desired velocity was noted. |
| Time to peak torque of hamstring | 6 weeks | Time required by hamstring muscle to reach peak torque was noted. |
| Time to peak torque of quadriceps | 6 weeks | Time required by quadriceps muscle to reach peak torque was noted. |
| Deceleration time of quadriceps | 6 weeks | Time required by quadriceps muscle to reach zero velocity from target velocity to, was noted. |
Countries
Saudi Arabia
Outcome results
None listed