Free climbing (as opposed to free soloing) is what I usually do, using protection and rope only as safeguards.

WSJ: Training for the Big Wall | By Michael J. Ybarra

Speculations and hypotheticals are fine, but given that I run a free promo on one of my books about every couple of weeks (I have 15 novels and climbing, so I can have a handful free now and again), I can say categorically that Amazon changed the algorithms.

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Parkour athletes - also known as free runners - cross urban landscapes by vaulting, leaping and climbing, using the skills of strength, balance, co-ordination and speed.

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Renting and other arrangements (living rent-free with family members or friends) show the opposite pattern, with rates climbing steadily starting at age 75.

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If free soloing (using only rock shoes, without the protection of a rope) is the purest form of climbing, then aid soloing is the slowest, most cumbersome kind one can imagine, mixing, as it does, terror and tedium.

WSJ: Training for the Big Wall | By Michael J. Ybarra