@jacobzemer: Comment "Cardio" for my complete guide to cardiovascular training. Four ways to improve your VO2 Max and fourth is the most efficient: 1️⃣ Zone 2 Training: 80% of your training should be in Zone 2 to help lower your resting heart rate. 2️⃣ 1:1 Ratio Training: One minute hard, followed by one minute off. 3️⃣ Rønnestad Method: 30 seconds on, 15 seconds active recovery for 13 rounds. Complete 3 total blocks with a 3-minute break between each. 4️⃣ Norwegian Protocol: 4 minutes on, 3 minutes active recovery for 4 rounds total. Comment "CARDIO" below to get my complete guide to cardiovascular training!