3. Workout Without a Gym: Use Your Own Body Weight
You don't have to use any equipment to get in some decent strength training.
Your own body weight is enough. And no, that's not a dig at your weight.
Body weight exercises can be used outside, as part of your outdoor gym workout, or at home for a workout on their own.
Body Weight Exercises
Push ups, squats, lunges, tricep dips, step ups, wall sits, glute bridge, sit up, crunch, plank, back extension, bicycle, dead bug, leg raise, inch worm, bear crawl, mountain climber, burpee and squat thrusts.
There are many variations of each of those exercises.
That should be enough to keep your workouts varied.
If you think bodyweight exercises won't give you as much benefit as using gym equipment, think again.
Increasing the reps and decreasing your rest, doing the reps quicker, not returning to a finish position and even slowing down the reps are all ways to make your workout harder.
If you don't believe me about the slowing down the reps try doing 4 squats, down for a count of 4, hold at the bottom for a count of 4, and up for a count of 4.
I promise your quads will be screaming.