Once you start High Intensity Training, 20 seconds – 3 times a day, it’s important to increase the tension settings on your crosstrainer every 1-2 weeks. You will be getting incredibly stronger from your 20 second workouts, and it’s essential to increase the resistance so you continue to benefit from the exercise. Most patients do best with a setting that feels like moderate resistance. There’s no warm up or cool down, so you need to be able to start exercising full out – without hurting yourself. If there’s too much resistance, you can injure yourself. If there’s too little resistance, you can also cause injury.