The app: 100% Army Fit is an excellent app for training and tracking your fitness.

Mainly based around running and bodyweight exercises. it comes with video instructions, motivation and completion trackers.

By using the app there is no expectation and you can pick either as a person just wanting to get fit, or if you want a specific challenge you can pick an army role to get fit for and make the base standards. Again by doing this, you are not joining the army it is just a training app.