This series alternates between the number 8 and an increasing sequence: 8, 22, 8, 28. The second numbers increase by 6 each time (22→28→34). Following the pattern, after 8 comes 34 (28+6).
The series alternates a fixed value of 8 with a steadily increasing sequence: 22, 28, and each of those increases by 6 (22, 28, 34). Since the pattern is 8, 22, 8, 28, 8, the next number should continue the increasing sub-sequence at 34.