We see it all the time gyms filled with people on the cardiovascular equipment and weight based machines. My question to them would be, outside the gym when do you try to lift or move something by first sitting or lying on a stable surface? NEVER! We are always moving and lifting in an unstable environment. Why then do we train in an stable environment? If you want to improve your strength, power, range of motion, flexibility, agility and core, you need to stop using machines!
A great tool, that is fun to play with at any age, is Indo Board Training. The Indo Board forces you to use your body the way it was intended, as one well functioning unit. Just by using the board 3 times a week for 10 minutes you will see improvements in all aspects of fitness. Give it a try, it is harder than you think. Make sure to heed the warning on the board.
Standing
Squating up and Down