The space often does determine group size for training. So does available equipment and most importantly how many clients can you work with effectively at one time? And are you comfortable with that number and is the class safe? As in, can you see what is happening and cue effectively to keep clients from doing something that could get them injured?
I agree with others who have said it’s space dependent, although if you plan well, sometimes you can plan around your space. I saw a trainer who had a very small (garage-sized storage unit) training floor but worked very efficiently with 4 clients in circuit (one station was a ladder drill outside in the parking area in front of his “gym”)
My ideal is 4 people of the same fitness level and motivation level.
My reality is 2-7 people of varying fitness levels.
The space u utilze, the type of training & what is used n the training should b addressed up front I think. Next is who is ur clintele & how comfortable r u commanding/directing/SUPPORTING more than 2 peppl(shrt hand;D) @ a time.
Im sure they will not all b on the same fit level & may require specific individual modification 2 what ur doing…
Then make sure U don’t get 2 comfy cause ur home…
Answer those questions first or u may be setting self up 4 failure. In-home is more complicated 2 me, but I like challenges….
I think it also depends on what type of small group training you’re going to be doing. The needs for equipment are different depending on small group personal training vs. an equipment specific small group training (TRX, kettle bell, bosu, etc) or a sport specific small group training (running, agility, etc). You’ll need room for each person to move, plus equipment storage and usage.
Also, depending on the type of small group training, some groups require more individual attention than others. How many people are you comfortable supervising? How individualized will the training be?
I keep my small group personal training to 3-5. My post-natal groups can go as high as 15. I offer more hands on guidance with the smaller groups and the larger groups are still managable for me.
I always err on the side of starting with a smaller group and then adding members in, once you know you can handle the size of the group.