Adopt a feral dog : they domesticate easily and their last countless generations of ancestors were among the fittest selected by nature for general wellness and energy, not specific characteristics by (an echo chamber of) breeders.
First hand experience : you'll not be bored, they're smart and loving, and energetic (and hilarious). You'll therefore be more physically active without being bored than you thought possible.
And when people joke about border collies being high energy, you'll get lots of exercise rolling your eyes. Ours has a husky rescue friend, with comparable and likely much higher energy level, but generally, a canine makes a great personal trainer.
First hand experience : you'll not be bored, they're smart and loving, and energetic (and hilarious). You'll therefore be more physically active without being bored than you thought possible.
And when people joke about border collies being high energy, you'll get lots of exercise rolling your eyes. Ours has a husky rescue friend, with comparable and likely much higher energy level, but generally, a canine makes a great personal trainer.