Figure 1From: Intensity level for exercise training in fibromyalgia by using mathematical models Correlation between age-predicted HRMax versus the achieved HRMax values. large circles = 220 - age, small squares = Fibromyalgia Model CI 95%, stars = 208 - 0.7 Ă— age. HRMax = maximum heart rate, CI = confidence interval. The circles and squares are inside confidence interval (CI) of fibromyalgia syndrome formula (Fibromyalgia Model HRMax = 209 - 0.85 Ă— age).Back to article page