“The Zone” is a new class offered at Fit Lab 253, where participants try to keep their heart rates within the optimal fat-burning zone.
“The Zone” is a new class offered at Fit Lab 253, where participants try to keep their heart rates within the optimal fat-burning zone. LIANNE GAMBLE Courtesy
“The Zone” is a new class offered at Fit Lab 253, where participants try to keep their heart rates within the optimal fat-burning zone. LIANNE GAMBLE Courtesy

Curious about your heart rate during a workout? Fit Lab 253 can help

July 13, 2017 02:48 PM

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