I had been looking forward to this trip for weeks - I also spent a day with the leader of my tour company the week before and asked him a dozen times if he thought i was fit enough (I am relatively fit, early 40's, have probably an excess 20 lbs and weak ankles). He convinced me I would be fine. What noone seems to mention is that the 'path' is like walking up on lumps of coal (for 4 hours). This is the lava that fell from the last eruption. It is incredibly uncomfortable, and slippery. I had to bail after 3 hours when it started to pour with rain. For sure I could have probably made it up, but i was petrified about the way down. Even with hiking poles (that i brought as i know i need them to support the ankles) and the best hiking boots (thank you salomon) I am sure it would have taken me 6-7 hours to come down. I didn't want to subject myself to that (in the pouring rain) nor did i want to subject my fellow hikers to waiting for me. I am sure it would have been an incredible experience and I am gutted that i didn't make it any further but also frustrated that I was allowed to start in the first place. So all the sites that say 'average fitness' required are lying. I live in a ski resort and ski and hike regularly - I am definitely of average fitness but the 6 hours hiking that I did almost killed me - by the time i reached the bottom i felt like my toenails were going to drop off, i was full of blisters (despite thick socks and well broken in boots) and i was a shaking wreck. Go and enjoy, but make sure you're up for it!