Before a missionary gets to the field, somebody checks their theology. Somebody checks their doctrine, their references, their fundraising plan, and — at the better agencies — their psychological readiness.
Whether their body can survive the assignment? That question rarely makes the checklist.
Then we act surprised at the attrition numbers.
The numbers agencies don’t put in the brochure
Roughly 1,500 North American ministry workers leave their work every month. Problems with mental and physical health rank among the leading reasons missionaries come off the field for good — and the toll is not evenly distributed: larger agencies lose around 6% of their missionaries a year, while smaller agencies lose up to a third of their people annually.
Among career healthcare missionaries — people who chose hard places on purpose — roughly two-thirds report moderate to severe anxiety, and about half report moderate to severe depression. And the window of greatest danger is well documented: the first five years of service — the exact years that follow the send-off party, when the support system is thinnest and the physical demands are highest.
Run the math on what one early return costs: years of training, a support network built donor by donor, language acquisition, cultural trust that took a term to earn — and a people group that goes back to waiting. Attrition is not a personnel statistic. It’s unfinished mission.
The screening gap
Here is the uncomfortable observation from inside the missions-preparation world: sending agencies screen rigorously for doctrine, generously for character, and increasingly for psychological health. Physical readiness? In our experience it’s rarely screened at all — and if your agency is one of the exceptions, we’d genuinely love to meet you.
Too often the candidate file holds no measure of load-bearing capacity — in a vocation of twelve-hour travel days on bad roads. No conditioning baseline, for placements at altitude, in heat, amid parasites and unfamiliar food. No look at sleep or stress-regulation habits, for a job whose first two years are one long stress test. Too many of us are sent to the physically hardest places on earth with a medical form and a prayer.
No military would deploy a soldier this way. Missions, as a system, deploys whole families this way — not from carelessness, but because nobody handed the senders a standard.
Physical readiness assessment for missions simply hasn’t existed as a discipline — there was no standard to adopt. That’s the gap BASE 1520 exists to close.
What a physical standard would look like
Not a military PT test. A missions-readiness baseline — honest measures of the capacities the field actually demands:
- Load-bearing strength: can you carry your own gear, a child, a water container — repeatedly, on bad terrain?
- Endurance capacity: can your heart and lungs handle sustained exertion, heat, and altitude without folding?
- Recovery infrastructure: do your sleep and fuel habits rebuild you daily, or is every hard week a withdrawal from an empty account?
- Resilience under load: have you done genuinely hard physical things before the field asks you to — or will the first real test be the one that counts?
Every one of those is measurable, and every one is trainable in the year before deployment — which is precisely when candidates are raising support and have the most reason to build capacity.
For the agencies reading this
You already believe in preparation — it’s why you screen theology and psychology. Physical readiness is the missing third screen, and it’s the cheapest one to add. A candidate who spends their support-raising year on progressive strength and conditioning arrives at the field with margin instead of arriving at their limit. Margin is what survives year three.
And if you want a standard you don’t have to invent: pair your sending requirements with completion of the Ethnos Course. Candidates who pass it haven’t claimed resilience on a form — they’ve demonstrated it under real load, real fatigue, and real field conditions. Pass/fail, documented, and ready to sit in a sending file next to the doctrinal statement and the psych evaluation.
This is exactly what we build: mission-prep training programs that run anywhere, an assessment that gives you an honest baseline — the Mission Readiness Check — and the Ethnos Course for hands-on field preparation. If you send people, we should talk: info@base1520.com.
The Great Commission deserves senders who prepare the whole missionary. We check their doctrine because souls depend on it. It’s time we checked their durability for the same reason.