I'm curious as to why more 15/16 year olds figure that they need to get stronger. Perfect your swing as much as you can, and see what's going on when you're 18. That said...

My first advice, regardless of age, is to inspect your swing. How much do you miss the middle of your driver face by? 1/4" off center translates into 5-7 lost yards. So, you could lose 20 yards by being 1" off center.

Secondly, if you want to get stronger, you have to weight train. I'm not sure what doogkie is saying (I don't understand carb loading when you're trying to build muscle). YOU DO NOT WANT TO BULK UP. The big thing is that while you're putting on muscle (getting stronger), you want to maintain your flexibility.

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True Length Technology Fitter - www.truelengthtechnology.com
It's live! - www.ShipShapeClubs.com
PCS Class 'A' Clubfitter

A new highlight: Golfing the home course on Christmas Day.

I say it too often: If it's golf club shaped, you can play with it.

For the record, I'm a club doctor, not a swing doctor.