Don't settle for 'average'... you know what you need to do... (and start young, if it is not too late, like this first guy!)...   Yes, even the somewhat older folks really benefit from regular training! ...we think he means business! OK, back with the bigger guys now...  

Don't stop training when you're tired... stop when you're DONE. All the pain is worth it for the gain in fitness. Exactly. Unusual use for a hamstring curl machine... Our customary shout out to the next generation: