Re: the "masters" stuff. As someone going into order age less than gracefully, I'm a little annoyed at what is classified as "masters", but I guess it is better than "Geritol Division" or "Old Farts"...
I did a 10K with my son on Saturday morning, and he was amazed to see runners significantly older than I am. Checking the results, there was a 73 year old that finished in 57 minutes, or 4 minutes faster than 58 year old me! And an 82 year old that finished 1:11:09! As I've told him, our bodies are for the most part use-it-or-lose-it, so stay active. Longer writeup will go in the training journal.
Shorts: I have a mix of womens and mens tights to wear under my running shorts. I have
large muscular thighs and get serious, painful chub-rub without them. I've used the barrier gels and sticks, but a physical barrier seems to be the best option, especially for longer runs. The mix of mens and womens was due to casting about for what worked and that had side pockets for my phone (no more waist belt or arm pouch). FWIW, I will still use my running belt on a full marathon just for all the gels, sunscreen, etc that won't all fit in pockets.
Here's what I've come up with on
Amazon and that I have bought and use:
Running shorts: Mier Men's training shorts, 5". Love these because they have an option for zippered pockets to keep stuff from falling out. Both left and right pockets are zippered, and IIRC, there is a small zippered pocket in the back of the waistband. I use that for things like a key fob so that it isn't swinging around in a side pocket. These are now my go-to shorts for nearly everything (not just for running) because of that. They don't have a lining, which to me is good since I always wear something under them.
Tights:
Lovesoft Women's workout cycling running yoga shorts with side pockets. These are made of a very thick material, so it holds everything snugly. For my wide beam, size 2XL seems to work, and I have to get the longer length inseam to make sure they go down my leg past the rub area. The only downside (for me) is that I could do without the higher waist since that doesn't work so well with my still-too-large gut, but they otherwise work great. I will use them for maintenance runs to save wear and tear on the Sanke shorts.
Sanke Mens Compression running shorts with phone pocket, 3 pack. Search for that on Amazon and in the picture you'll see "PRO" in large letters on the waistband.
Love these! They aren't too thick, have a side pocket on both sides, a mens waist, and long enough inseam to do the job. If I'm going to spend the day walking around, I'll be wearing these under my shorts, as they are all-day comfortable. I need to order more of them (and just did). $18.99 for a 3-pack.