A problem with Fast Weight Loss
The solution? Youprobably need to the gym every second day and work your way around all the machines and also do some free weights until the tone is back and everything looks good again. Ask the instructor for guidance - that's what they are there for.
And really, all the machines they have! Don't think that this or that muscle doesn't matter! It does if you want to be in good shape.
You don't need to do a punishing workout. Just say 10 very slow repetitions on each weight machine until you feel just the slightest bit of muscle burn.