Figure 3. Heart rate (HR) during constant-load resistance exercise. IRT = incremental resistance test; CLT = constant load test. * Differs significantly versus remaining values (p < 0.05). # Differs significantly versus Set 21 (p < 0.05). †  = Differs significantly versus Set 18 (p < 0.05). ‡ = Differs significantly versus Set 15 (p < 0.05). $ = Differs significantly versus Set 12 (p < 0.05).