Long Zone 2 Cardio:
For improved: Heart, brain, lungs, circulation, pain, balance, mood, BP,

1 round is
10 minutes at the bottom of Zone 2
5 minutes at the top of Zone 2

Find zone 2 by using this formula:
(220- your age) x 0.6 for the bottom of zone 2
(220- your age) x 0.7 for the top of zone 2

Use a heart rate monitor (HRM)

Scaling:
S: 2 rounds, 30 mins total
M: 3 rounds, 45 minutes total
L: 4 rounds, 60 minutes total
XL: 6 rounds, 90 minutes total

Feel free to swap between a run, bike, ski-erg, cross trainer etc. each round

Photo by <a href="https://buff.ly/4c9FxBM">Ikrom Chinaski</a> on <a href="https://buff.ly/4cbEb9w">Unsplash</a&gt;
  
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