An adjustable crutch, cane or similar walking aid for assisting everyday movement for temporarily injured and even permanently handicapped persons, the crutch having telescoping crutch tubes encasing a locking gas spring crutches which can instantaneously and controllably be adjusted in length during use, thereby considerably facilitating such common physical activities as sitting down, standing up, negotiating stairs or other obstacles and other similar everyday mobile activities. The locking gas spring functions by internal gas pressure and the telescoping crutch tubes are extended as the internal gas pressure seeks to reach the lowest energy state by maximizing its internal volume. For safety purposes a disengagement mechanism is provided so that extension occurs up to a preset level dictated by the user, and can even be overridden if desired.