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Purpose of the study is: to investigate the effects of 8 weeks intervention of high intensity resistance training(HIRT) combined with Blood Flow Restricted Exercise (BFRE) compared to high intensity resistance training alone.
Detailed Description: 30 elite handball players will be randomized into 2 groups of 15 participants each. Participants will be evaluated in the week before and the week after an 8-weeks training intervention with 2 weekly sessions. Based on their baseline muscle strength the participants will be randomized into two groups: HIRT-BFRE or HIRT-HIRT. Participants in both groups will perform a full-body training programme of HIRT. After the Full-body programme, Back squat exercise with low intensity and Blood flow restriction will be performed to the HIRT-BFRE group and back squat exercise with high intensity without blood flow restriction will be performed by HIRT-HIRT. Evaluation protocol includes: muscle strength measurement with 1 repetition maximum of Back squat and knee extension, muscle mass with Dual-Energy X-ray absorptiometry, muscle thickness of the thigh with ultra sound measurement, vertical jump height with linear Encoder, sprint performance with 30m sprint time.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| RT + BFRE | Experimental | High intensity Resistance training combined with Blood Flow |
|
| RT | Active Comparator | Resistance training alone |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Resistance training | Behavioral | A full-training programme with high intensity followed by back squat exercise with blood flow restriction. Inflatable cuffs will be placed proximally on both thighs. The cuff pressure will be 50% of individual arterial occlusion pressure and will be maintained during the rest intervals. Participants will perform 30, 15, 15 and 15 repetitions of 30% of 1 Repetition Maximum. Totally 75 repetitions will be performed. 45 seconds rest interval between sets will be given. |
| Measure | Description | Time Frame |
|---|---|---|
| Change in Maximal Muscle Strength | Change in 1 RM (repetition maximum) muscle strength in back squat | Baseline measurements at week 1, after four weeks of exercise at week 5 and post intervention at week 10. |
| Measure | Description | Time Frame |
|---|---|---|
| Change in Lean body mass | Change in lean body mass assessed by Dual Energy X-ray Absorptiometry | Baseline measurements at week 1 and post intervention at week 10. |
| Measure | Description | Time Frame |
|---|---|---|
| Jump Performance | Change in jump height. Change in vertical jump height (in cm, with Chronojump Linear Encoder Kit). Participants will perform a counter movement jump and jump as high as possible. The jump height will be recorded. | Baseline measurements at week 1 and post intervention at week 10. |
| Sprint performance |
Inclusion Criteria:
Exclusion Criteria:
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Simon Lønbro, PhD | Contact | 004521600410 | loenbro@ph.au.dk |
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Dept. of Public Health | Recruiting | Aarhus | 8000 | Denmark |
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| ID | Term |
|---|---|
| D006984 | Hypertrophy |
| ID | Term |
|---|---|
| D020763 | Pathological Conditions, Anatomical |
| D013568 | Pathological Conditions, Signs and Symptoms |
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| ID | Term |
|---|---|
| D055070 | Resistance Training |
| ID | Term |
|---|---|
| D005081 | Exercise Therapy |
| D012046 | Rehabilitation |
| D000359 | Aftercare |
| D003266 | Continuity of Patient Care |
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|
Sprint performance. Change in sprint time (in seconds, with Witt speed gates). Participant will perform a 30-meter sprint on an indoor handball court. The time to perform a 30-meter sprint will be recorded. |
| Baseline measurements at week 1 and post intervention at week 10. |
| D005791 |
| Patient Care |
| D013812 | Therapeutics |
| D026741 | Physical Therapy Modalities |
| D064797 | Physical Conditioning, Human |
| D015444 | Exercise |
| D009043 | Motor Activity |
| D009068 | Movement |
| D009142 | Musculoskeletal Physiological Phenomena |
| D055687 | Musculoskeletal and Neural Physiological Phenomena |