These techniques are suitable for the vast majority of people, no matter your mobility/ flexibility. There are some contraindications which include:
malignancy, febrile state, acute circulatory condition, aneurysm, acute rheumatoid arthritis, sutures, healing fracture, osteoporosis or advanced degenerative changes, celiulitis, systemic or localized infection, osteomyelitis, obstructive edema, open wounds, hematoma, anticoagulant therapy, hypersensitivity to skin, advanced diabetes.
If in doubt, consult your GP/ health care provider.