Here is a detailed fact-check of each claim in the infographic:

Partially supported, but the timeframe is misleading. Walking does reduce blood pressure, but the evidence for a meaningful effect from just 3 minutes/day is very thin. Studies show that blood pressure reductions from walking typically require sessions of at least 10 minutes and sustained practice over weeks, not a single 3-minute bout. A 2018 PeerJ study (PMID 30186685) showed reductions after 6 months of guided walking programs. The "3 minutes" figure is an oversimplification - likely referring to brief bouts of activity interrupting prolonged sitting, not a standalone claim.

Supported. This one is well-backed. Research on "green exercise" (outdoor physical activity) consistently shows rapid mood improvements, even in short bouts. A frequently cited meta-analysis found that just 5 minutes of exercise in a natural environment produced significant improvements in mood and self-esteem. The claim is reasonable.

Supported. A well-known Stanford study (Oppezzo & Schwartz, 2014) found that walking - even on a treadmill - boosts divergent (creative) thinking during and shortly after the walk. The effect has been replicated. This claim is accurate.

Supported. This is one of the most evidence-backed claims. A 2022 Nutrients study (PMID 35268055) confirmed that postprandial walking significantly blunts post-meal glucose spikes. Even 10-15 minutes of light walking after eating has a meaningful effect on blood glucose. The claim holds up.

Partially correct, but the parenthetical disclaimer matters a lot. Walking does contribute to weight loss, but 30 minutes of post-meal walking alone is unlikely to produce meaningful weight loss without dietary changes. A clinical trial (PMID 12439651) found a dose-response relationship - more walking leads to more weight loss, but results are modest. The caveat "depending on walking speed" is accurate and important. Overall the claim is directionally correct but could be misleading in implying guaranteed weight loss.

Supported. The famous Honolulu Heart Program (PMID 10393674) followed elderly men and found that those who walked more had significantly lower rates of coronary heart disease. The 40-minute figure is consistent with the walking habits of the lower-risk groups in that study. This is one of the strongest claims in the infographic.

Supported. A landmark Stanford/PNAS study (2015) found that participants who walked 90 minutes in a natural setting showed significantly lower neural activity in the subgenual prefrontal cortex (associated with rumination) compared to those who walked in an urban setting. An RCT (PMID 22464936) also found nature walks helped people with depression. This claim is well-supported.

Overall verdict: The infographic is mostly accurate and generally in line with published research. The weakest claim is #1 (3 minutes reducing blood pressure) - it is an oversimplification. The others range from directionally correct to strongly supported. As always with health infographics, individual results vary and walking speed, baseline fitness, and health conditions all matter.