If we talk about efficiency, then gym training will be much better than at home with your weight. However, now many people do a small gym at home and buy all the necessary arsenal for this, and in fact, all you need is a barbell and more plates. For me personally, this is the most comfortable option for training. Still, so far, I can't afford it and regularly just visit the gym that is next to me. I recently learned about SARMs and want to buy Ostarin from this site -- purerawz.co, I really don't know what side effects it may have.

Depends on one’s age and one’s interests. At 72, walking, doing planks, using a resistance cord and lightweight free weights are enough for me. No need for a gym in my case.

Both. We have a great smallish gym here which is very concerned with the health of it's members. It was closed during most of the pandemic and I did a lot of workouts at home (which I still do). Later they reopened and a couple of months ago required members to show proof of vaccination. Lately a mask mandates were re-instituted. They also installed some great air filters with UV purifiers. The gym is never full and several programs are offered including a Silver Sneakers one for the more sedentary. [lopezfit.org]

I have been biking a lot since the pandemic, but I have a treadmill in my living room -- kinda hard to ignore.

Personally I wouldn't join an indoor gym at this time, but I was a member of my local gym off and on over the years. This last time, I canceled, just a few years ago, I was paying $50 per month, but by saving that $50 each month, I actually felt I got more of a workout using my outdoor pool (even though it's cold most of the year, I wear a wet suit) and my bicycle (I have a bike path right outside my door) and evening walks (I live right along a beautiful walking trail.)

I can also dance and do some floor exercises in my home, and have various things I can use as weights, if I choose. I use swim paddles in my pool to get a bit more resistance than regular swimming. Not sure if all that helps, but I enjoy it. (Besides, I can listen to my own music instead of the rap they had playing at they gym.) I do miss the weights though.

So, I checked the box for "depends on how much equipment you have at home."

bike.

There's too much COVID going around still for the gym. I like going there, so maybe when I get a booster shot it will be more of an option.

It really depends on the person. I, for example, detest gyms and will not go to one. That doesn't mean I don't exercise. I assume that's not an issue for most people, so if that's your thing, go for it.