Not that you're saying Dad's getting a little thicker around the middle, but those years of backyard grillfests might be starting to show a little more each year. And since he may think "core training" has something to do with using apples on the barbecue, you might want to gift him with the TRX Rip Trainer this year.

A 42-inch commercial-grade bar with a sheathed elastic resistance cord that can anchor to any solid object (so dad can workout anywhere there's a fence, railing, tree, or door), the TRX Rip Trainer focuses on spiral movement patterns with an emphasis on rotation. (Video after the jump.) That's trainer-speak for it'll strengthen Dad's core, increase his power, lessen the risk of him getting injured picking up a bag of charcoal, and will enhance his overall cardiovascular fitness. But don't tell him that. He'll never use it. Maybe just say it'll help improve his casting distance when fishing.

The whole thing weighs less than four pounds, can be stored just about anywhere, and is easy enough even for Dad to set up. It also comes with a Basic Training DVD and full-color reference guide, so Dad doesn't pull something trying to use the thing. And write you out of the will. Check out the video below to see the TRX Rip Trainer in action.
$189.95
TRXTraining.com