While Table 8-23 provides useful information, keep in mind that its widespread application is limited for several reasons: • Much of the research to establish the 1-RM repetition table was primarily based on research using trained male athletes.
• This table is based on single-set research and the values may need to be lowered with multiple-set training.
• This table is derived from bench press, squat, and power clean exercises and has not been effectively validated using other exercises.
• This table is based on free-weight exercises and the values may need to be adjusted for machine-based exercises.
• This table has demonstrated accuracy for loads greater than 75% 1-RM and is not as accurate for lower intensities.
1-RM Leg-press Test
This test assesses lower-extremity strength using a stable, supported movement: the leg press. It is only suitable for individuals who demonstrate proper form in performing a leg press and are free of low-back or knee pain. Equipment: • Leg-press machine Pre-test procedure: • After explaining the purpose of the 1-RM leg-press test, explain and demonstrate the proper technique for the leg press (Figure 8-19). ü The client assumes a seated position with both feet planted firmly on the foot plate.
ü The ROM during the leg press begins with the legs fully extended, but not hyperextended, with heels flat on the surface, and ends at a 90-degree bent- knee position with the knees aligned with or behind the toes.
ü The client should inhale while slowly lowering the weight (to the bent-knee position) and exhale while extending the legs (pushing the weight). Breath- holding (or the Valsalva maneuver) should be avoided.
ü Instruct the client to avoid locking the knees and not to exceed a bent-knee angle of 90 degrees. Ensure proper foot placement to avoid undue strain on the knees.
• Encourage the client to perform a few practice trials to ensure proper technique. • The goal of the test is to determine the 1-RM. It is important not to fatigue the client by having him or her perform too many “unnecessary” repetitions. Finding a suitable starting weight is important.
• The responsibilities of the spotter include providing assistance with pushing the rack during an incomplete attempt.
