Annie Murray | Online Coach on Instagram: "The 12 3 30 incline walking method went viral for a reason. It can be very effective when used well. That usually means walking on an incline around 12 percent at a steady, challenging pace for up to 30 minutes. Strength training protects muscle, bone density and metabolism as we age. Adding incline walking after your strength session improves insulin sensitivity, supports fat loss and builds cardiovascular fitness without excessive stress on the body.