I use my local park and bring my hand weights, med ball, and bands and a mat if needed. I use the picnic table for step-ups and stretching. I use the curb parking bumps for reaches. I use the parking lot surface if it isn’t busy to do medball slams, etc. And I also make a routine of fast walking for an number of minutes, stop and do body weight exercises or band work for a number of minutes, and then walk, stop exercise, etc along a route I planned out. The hills in my park are killer and fun, too! Every time you go, you can do different things.
Consider looking into Crossfit! (I can feel the thumbs down that are coming my way, haha)
Some of the outdoor activities that people do with Crossfit (flipping tires, carrying objects, jumping over natural hurdles, throwing self-made sandbags of various weights and sizes, just to name a few) could definitely good activities to add in if you get the opportunity and your clients are not contraindicated for those activities. I was dubious about the whole Crossfit thing at first, and some things are still pretty “out there” to me, but I’ve used the above exercises quite effectively in my clients’ routines as welcome changes in their programs every so often.
You might be surprised what you can find in a public park/public area that can present a welcome and surprisingly safe challenge when you’re cautious. Use your imagination. That’s what’s going to set you apart from other trainers!
Also, you might consider investing in some orange cones to set up some agility drills, some jump ropes, a rope ladder, etc?
Parks, beaches, different surfaces, local tracks all provide imaginative options. Also bring bands, medicine balls, ropes, ladders for speed, agility and other exercises – lucky here in Florida as outside is nearly always an option – but if its raining we also utilize parking lots and multilevel garages, just let your imagination run wild – but be mindful of your surroundings and client safety is always a priority .