At 70 and in spite of a physically active life I had been 15-20 kg overweight for a while and had difficulty walking more than just a few minutes before having to take breaks due to debilitating lower back pain and sciatica issues…Francisco guided me to losing all my extra weight (within 6 months) which had the carryover effect of also greatly improving the my back/sciatica problems. In fact last year to celebrate my 75th birthday I ran my first half-marathon distance ever, a feat I repeated 3x times within a month! My energy level has also gone up to levels I had not felt since my early 40s.