Healthy Active Males
Conditions
Brief summary
This randomized controlled trial compared two exercise approaches for strengthening the hip adductor muscles in healthy, recreationally active adults. Participants were assigned to one of three groups: training using a custom isokinetic device, training using the Copenhagen adduction exercise, or a control group that did not perform the specific hip adductor training. The intervention lasted 8 weeks. The device-based program used controlled eccentric muscle actions, in which the hip adductors produce force while being lengthened, whereas the Copenhagen adduction exercise involved a commonly used body-weight strengthening exercise. The purpose of the study was to determine how these two types of hip adductor training affect muscle strength and other physical characteristics that may be relevant to performance and the prevention of groin and hip adductor injuries. The main research question was whether training with the isokinetic device produces different and potentially greater adaptations than the Copenhagen adduction exercise and no specific training. The study hypothesis was that device-based eccentric training would lead to greater improvements in hip adductor strength and related functional and muscle characteristics than copenhagen adduction exercise training, while the control group would show little or no change.
Interventions
OTHERIsokinetic device-based hip adductor training
An 8-week, twice-weekly hip adductor training program performed using an isokinetic device. The exercise involved controlled eccentric contractions of the hip adductors. The device moved the lower limbs into hip abduction at a controlled angular velocity while participants resisted the movement with the hip adductor muscles. Training volume was progressively increased over the intervention.
OTHERCopenhagen adduction exercise training
An 8-week, twice-weekly hip adductor strengthening program using the Copenhagen adduction exercise. Participants performed the exercise with an emphasis on the eccentric phase, and training volume was progressively increased.
Sponsors
University of Primorska
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
BASIC_SCIENCE
Masking
NONE
Eligibility
Sex/Gender
MALE
Age
18 Years to No maximum
Healthy volunteers
Yes
Inclusion criteria
* Healthy and free from musculoskeletal injury at the time of enrollment; * Recreationally active males; * Able to successfully complete 5 repetitions of the Copenhagen adduction exercise.
Exclusion criteria
* Serious injury to nervous, muscular, skeletal, or connective tissue involving the back, hip, or lower extremities within the previous 12 months * Inability to perform the Copenhagen adduction exercise
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Eccentric adductor peak torque | Baseline and after the 8-week intervention | Eccentric hip adductor peak torque of the dominant leg measured using an isokinetic dynamometer (Humac Norm) at an angular velocity of 30°/s |
| Eccentric work | Baseline and after the 8-week intervention | Work during eccentric hip adductor contraction of the dominant leg measured using an isokinetic dynamometer (Humac Norm) at an angular velocity of 30°/s |
| Adductor longus muscle thickness | Baseline and after the 8-week intervention | Adductor longus muscle thickness measured using ultrasound imaging. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Angle at peak torque during eccentric contraction | Baseline and after the 8-week intervention | Angle at peak torque during eccentric contraction of the dominant leg measured using an isokinetic dynamometer (Humac Norm) at an angular velocity of 30°/s |
| Concentric adductor peak torque | Baseline and after the 8-week intervention | Concentric hip adductor peak torque of the dominant leg measured using an isokinetic dynamometer (Humac Norm) at an angular velocity of 30°/s and 90°/s |
| Concentric abductor peak torque | Baseline and after the 8-week intervention | Concentric hip abductor peak torque of the dominant leg measured using an isokinetic dynamometer (Humac Norm) at an angular velocity of 30°/s and 90°/s |
| Hip Adduction:abduction strength ratio | Baseline and after the 8-week intervention | Ratio of concentric hip adduction to abduction peak torque. |
| Lateral shuffle test | Baseline and after the 8-week intervention | Time to complete the lateral shuffle test using photocells. |
| Passive hip abduction range of motion | Baseline and after the 8-week intervention | Passive hip abduction range of motion measured using a goniometer, expressed in degrees. |
| Adductor longus muscle stiffness | Baseline and after the 8-week intervention | Adductor longus muscle stiffness assessed using ultrasound-based elastography and expressed in kPa. |
| Passive resistance to hip abduction | Baseline and after the 8-week intervention | Passive resistance to hip abduction assessed using an isokinetic dynamometer; stiffness derived from the torque-angle relationship. |
Countries
Slovenia
Outcome results
None listed