Chanting is more effective than the yoga system in this age:

This material world has been likened to a great forest fire. As in the forest, fire may automatically take place, so in this material world, although we may try to live peacefully, there is always a great conflagration. It is not possible to live in peace anywhere in the material world. 

But for one who is transcendentally situated−either by the meditational yoga system or by the empirical philosophical method or by bhakti−yoga−Peace is possible. All forms of yoga are meant for transcendental life, but the method of chanting is especially effective in this age. 

Kirtana may go on for hours, and one may not feel tired, but it is difficult to sit in lotus position perfectly still for more than a few minutes. Page 52 - Namamrta