I made an animation with 7 keyframes along the 250 frames, but the playback is very slow and the character which should be running feels like he is doing it in slow motion, is there a way which I can adjust that in a quick way to fix the speed??
The way I normally do this is in the dope sheet/action editor. put your playback cursor at your first frame, A-key to select all the keys, then S-key to scale their spacing/timing. Or S-key-0.5 say to make your action 2x faster. You’ll probably want to adjust your animation length then too, from the default 250f.