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Table 1 Age and gender thresholds for study inclusion

From: Impairment-targeted exercises for older adults with knee pain: protocol for a proof-of-principle study

  Male Female
Range of knee joint flexion
55-64 years < 128° < 127°
65-74 years < 125° < 122°
75+ years < 120° < 117°
Isometric quadriceps strength (kilograms force)
55-64 years < 18.1 < 11.3
65-74 years < 17.2 < 9.4
75+ years < 13.9 < 9.0
Single-leg standing balance (seconds)
55-64 years < 8 < 5
65-74 years < 3 < 3
75+ years < 2 < 2