Why is there a need to spend more than an hour at training per day? There isn't. One hour a day of efficient training is the best way to maintain health and fitness. Too many people spend too long working out with rest times in between sets too long. The key to increasing aerobic capacity is to reduce your rest time between sets and maintain a steady heart rate to improve your overall fitness. This makes it a lot less time and is more achievable to find 1 hour per day.
Putting it into your diary, like any appointment is the key.
Make the time. 7 hours a week out of 168 hours. Equals 4% of your time.
Not a big commitment.