If you are considering having a massage before or after your yoga class, either way is totally good. Receiving a massage before your yoga session will increase pump up oxygenated blood around your body, assist in the detoxification process which will, in turn, leave your muscles supple and relaxed for your Sweat yoga class.
If you have a massage after your class, your muscles will be supple, joints relaxed and you will be detoxifying. The massage will assist in ridding the body of toxins further, lactic acid builds up in your muscles and improves your lymphatic system.
For efficiency of aromatherapy essential absorption, it is best to have a quick shower prior to your massage as well as hygienic purposes after your class.