I have on several occasions taken an extended break from the gym for various reasons. When I return, I find it hard to continue my workouts (even at a lower weight) for about 2-3 weeks. Muscles take longer to recover for that period (e.g. they will be very sore for more days than usual) and starting to lift weights again for the first couple of days has on occasion even made me vomit afterwards. I also find it hard to complete the full workout that I would have done before and end up skipping a couple workouts because of muscle pain / inability to continue using them effectively.
With limited time (let's say 20-30 minutes 3 times per week) and mostly my own body to use, is there a way I can retain my tolerance to weightlifting so that when I return to the gym, my muscles will recover as they were and I won't feel unwell after the first few sessions?
Note: Obviously I will need to work back up to the weight I was using, I don't go back after 2 months and try to lift the same weight I was on.