In order to examine the effect of RIPC on skeleton muscle exertional damage and on aerobic and anaerobic physical performances, 30 healthy volunteers will undergo a series of different physical tests twice; once without intervention and a second time with RIPC intervention or placebo (false) intervention.

30 healthy civilians volunteers will be recruited and divided randomly into 2 groups: RIPC group and control group.

The experiment protocol consist 2 series (with a month between them), both series include the described 3 days:

Day 1 - anthropometry measurements and VO2max test (BRUCE protocol). Day 2 - steps test (heled protocol). Day 3 - anaerobic test (wingate protocol), 1 hour rest and time to exhaustion test (heled protocol).

The first series will be performed without applying any intervention and is considered as baseline measurements for both groups. the second series will be performed as follows: a. RIPC group: applying RIPC exposure (placing a sphygmomanometer on the non-dominant hand and applying pressure of 200 mmHg for 5 min followed by 5 min without pressure X 4 repeats) at the beginning of every meeting. b. control group: with placebo (false) exposure (placing a sphygmomanometer on the non-dominant hand and applying pressure of 100 mmHg for 5 min followed by 5 min without pressure X 4 repeats) at the beginning of every meeting.

Blood ample, lactic acid and urine sample will be tested at the beginning and end of every meeting (testing for muscle, skeleton and kidney function markers).

Inclusion Criteria:

• aged 18-30
• healthy civilians volunteers
• with no background illnesses
• above average fitness

Exclusion Criteria:

• known chronic medical illness
• routine medication usage
• history of rhabdomyolysis
• the physician decision