Spring arrives with the passive brake on the tightest setting, for your safety.
If you find it hard to depress for easy walking, try these three steps:
1) Lower the adjustable handlebar to a lower setting.
Your arm should be almost straight.
2) Stand inside Spring, so that your feet are between the front and
rear wheels. (If you have been using another walker, this is
probably considerably farther forward than you are used to.)
Press straight down on the handlebar.