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EMG activity while walking on land and in water in healthy individuals (n = 4). Rectus femoris, RF (A), biceps femoris, BF (B), tibialis anterior, TA (C), and gastrocnemius medialis, GM (D). Gait phases: 1 = initial contact, 2 = loading response, 3 = mid stance, 4 = terminal stance, 5 = pre swing, 6 = initial swing, 7 = mid swing, and 8 = terminal swing.
