I wanted to update my comment from earlier. Around August 1, I switched from water walking in pool shoes to regular sketchers walking shoes (brand new pair approved by my pool manger to only use in the pool). The soles of these shoes are much thicker than my old pool shoes and provide great arch support. This reduced by lap time by 10 seconds. I also went to Dick’s Sporting goods and purchased a pair of neopreme swimming gloves. They are webbed between the fingers and allow my arm stokes to generate much more force in the water. They have reduced my lap time by another 10 seconds. Also increased the resistance on my arms and shoulders improving the quality of the workout.
With the speed increase from the shoes and gloves I have upped my lap count to 60 on Monday and Friday and to 50 on my lighter days Tuesday and Thursday. On wednesday I go upstairs to the weight room for measuring my strength changes and doing isometrics.
Since I changed these two variables up aside from faster lap times, my bench press is now up to 165lbs from 140lbs in July, rowing machine at 170 lbs from 130lbs in July and leg press machine from 165lbs in July to 210 lbs now.
How far can it go? Who knows, but its fun to see the progress these subtle changes have created. I would be interested in how others use pool walking and aerobics while fasting and benefits you’ve experienced.