Although meditation seems to be a pure mental or spiritual practice, it’s usually not really the case. In fact, physical exercises are generally needed to prepare the body on the mental activity of concentration and meditation, and as such, meditation often includes bodywork.
One of the important aims of (physical) Yoga is exactly that. The idea is that only a relaxed, peaceful and “open” body, where, by the way, Prana or Life Energy flows unhindered, can come to a fruitful concentration and meditation practice, which may finally lead to Liberation or Enlightenment (which is the ultimate goal of almost all Indian spiritual practices, including Tantra).
Tantric Meditation uses a variety of tools and techniques to help us heal and grow spiritually. Think of the use of certain Yoga Asanas, pelvic floor exercises, breathwork (pranayamas), visualizations, mindfulness, mandalas, mantras, nyasas, mudras, and yantras. The explicit goal of Tantric Meditation is to awaken, harness or stimulate Pranic Shakti Energy (Kundalini Energy) to rise from the root Chakra to the crown Chakra, where it can join universal consciousness and bliss.
Apart from the above, as counts for all types of meditation practices, there are certain benefits to be obtained by meditating, such as a reduced blood pressure, an optimal working nervous system, heightened immunity, increased awareness and concentration, stability in emotional states, control of thoughts and feelings, greater mental capacity and improved memory, to just name some of the health benefits.