W4D3 – Aerobic 

Swimming: Traditional Zone 2 Aerobic Training  50 mins AMLAP, completed about 1900m. Alternate each lap between freestyle and breaststroke. HR range: 174-150 Average freestyle lap: 1'10" Average breaststroke lap: 1'30" Stopped every 5 mins to check HR. Heart rate kept dropping from 174 the first few laps to 150 for the last few laps. I just … Continue reading W4D3 – Aerobic