"We're getting good blood flow. We're training our heart muscle to work more efficiently, and … actually strengthening it. So if wij … don't do that — if we're doing something too light — wij won't get as much of the beneficial effect." Koerslijst: Jouw kan de BPM ook berekenen https://bpm65420.targetblogs.com/35927962/5-tips-over-bpm-u-kunt-vandaag-gebruiken