Dear Team
Baz is 100% right, here's a few grim tips:
Petroleum jelly or vaselene - personally I buy it in industrial sized tubs. Or more accurately, I get my wife to go and buy it for me in industrial sized tubs.
For long distances / short distances if reauired, slap it on around the groin / leg area, under the front of the armpits and inside each knee if you are a lady (trust me on this). Put on much more than you think you need, all around the joint where the inner part of your shorts rubs your skin. Feels funny till it warms up.
Nipples need special attention (!) - runners nipple is ABSOLUTE AGONY. Slap on the vaselene, or two crosses of micropore surgical tape followed by vaselene on top. P for plenty is the key. Trust me, it really hurts BAD when your nips bleed.
Wash kit very often if you sweat - the salt beds into the material and it becomes abrasive, like a saw where it touches skin.
Very long distance? Blob of vaselene wrapped in cling film in the pocket of your shorts - you wont like packing it, but if you need to apply it 5 miles from home, you will be glad you did!
In a marathon once, I used an energy gel to reinforce the lubrication. It worked to a small degree. This reversal of use made me wonder if vaselene has any nutritional properties - then again, perhaps not.
So there you go - slap it on all over.
Gavin