I'm developing a minigame server. I just need to know what commands to use, via command block, to give players special conditions infinitely such as; speed boost, regeneration, or jump boost.I know it's possible, I've played on games that use these things, or is it a mod?

I'm developing a minigame server. I just need to know what commands to use, via command block, to give players special effects infinitely such as: speed boost, regeneration, or jump boost. I know it's possible, I've played on games that use these things, or is it a mod?